TIOCSPGRP(2const)                                            TIOCSPGRP(2const)

NAME
       TIOCGPGRP, TIOCSPGRP, TIOCGSID - process group and session ID

LIBRARY
       Standard C library (libc, -lc)

SYNOPSIS
       #include <asm/termbits.h>  /* Definition of TIOC* constants */
       #include <sys/ioctl.h>

       int ioctl(int fd, TIOCGPGRP, pid_t *argp);
       int ioctl(int fd, TIOCSPGRP, const pid_t *argp);
       int ioctl(int fd, TIOCGSID, pid_t *argp);

DESCRIPTION
       TIOCGPGRP
              When successful, equivalent to *argp = tcgetpgrp(fd).

              Get the process group ID of the foreground process group on this
              terminal.

       TIOCSPGRP
              Equivalent to tcsetpgrp(fd, *argp).

              Set the foreground process group ID of this terminal.

       TIOCGSID
              When successful, equivalent to *argp = tcgetsid(fd).

              Get the session ID of the given terminal.  This fails with the
              error ENOTTY if the terminal is not a master pseudoterminal and
              not our controlling terminal.  Strange.

RETURN VALUE
       On success, 0 is returned.  On error, -1 is returned, and errno is set
       to indicate the error.

ERRORS
       ENOTTY The terminal is not a master pseudoterminal and not our
              controlling terminal.

       EPERM  Insufficient permission.

SEE ALSO
       ioctl(2), ioctl_tty(2), tcgetpgrp(3), tcsetpgrp(3), tcgetsid(3)

Linux man-pages 6.9.1             2024-06-13                 TIOCSPGRP(2const)